Sony KD-43X7 G Series Service Manual page 20

2.0 : LED Blinking: 2x (Main power Error)
BB9（G* Board model）
2-time blinking
Check "+19.5_12.5V_MAIN"
at pin 15/16 of CN5500
on BB9 Board,
Voltage 12.2V -13.2V?
*Typical 12.7V*
No
BB9 Board
Yes
G* Board
BB9（AC adapter model）
2-time blinking
Check "+19.5_12.5V_MAIN"
at pin 15/16 of CN5500
on BB9 Board,
Voltage 16.44V – 23V ?
*Typical 19.5V*
No
BB9 Board
Yes
LD Board
20
SYS SET